package com.heima.admin.gateway.filter;
/*
    
 需求描述：
 @Author: wang
 @Date: 2022/10/11 11:27
 
 */

import com.heima.admin.gateway.utils.AppJwtUtil;
import io.jsonwebtoken.Claims;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

public class AuthorizeFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();
        // 判断是否为登录请求
        if (request.getURI().getPath().contains("in")) {
            return chain.filter(exchange);
        }
        // 获取token
        String token = request.getHeaders().getFirst("token");
        // 判断token是否存在
        if (token == null) {
            // 返回响应状态401
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }
        try {
            // 判断token是否有效
            Claims claimsBody = AppJwtUtil.getClaimsBody(token);
            int status = AppJwtUtil.verifyToken(claimsBody);
            if (status == 1 | status == 2) {
                response.setStatusCode(HttpStatus.UNAUTHORIZED);
                return response.setComplete();
            }
        } catch (Exception e) {
            e.printStackTrace();
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            return response.setComplete();
        }


        // 放行
        return chain.filter(exchange);


    }

    @Override
    public int getOrder() {
        return 0;
    }
}
